Yarn-changing mechanism for knitting-machines.



R; w. scan. 'YARN CHANGING MECHANISMFOR KNITTING APPLICATION Hm) sgr. 2.' is". 1,178,683.

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. Patented A r. 11, 1916. @j I v 2 SHEETS-SHEET l- R. W. SCOTT.

GHANISMTOR KNITTING MACHINES. Amlfcmou FILED sm. 2.1914.

mu. cnmmns ME -2 SHEETS-SHEET 2.

quent. The thrust-bars 460 constitute operating connections individually controlled by the pattern surface 120.

For yarn changing occurring a plurality of times in each course ot movement of the selected pair of yarn guides F at shorter intervals, and in time with the passage by the throat plate 559 of a predetermined part of the needles, is provided for.

I prefer to employ at the location of the sutures inthe fabric shortbutt needles 11-, among a series of needles having longer butts n, n, and a top center cam 8 cut away at 10 to secure a higher position of the two or more groups of sutureneedles n at the yarn guides, the difference in elevation between the suture needles n and the remaining'needles aiding the sharp entrance and exit of the yarn on either side of said suture needles. The yarn guides for thesplit fabric when in their lowermost position deliver their yarns to all of the said needles, when in an intermediate position, deliver their yarn above the heads of all of the needles,

except the suture needles and when in an upper position,.'hold' the yarn idly above all the needles.

In order to actuate two of the thrust bars,

which may be any two, so as to enter and remove the yarns of their yarn uides F for the purpose stated, I provide said thrust bars with notches a, capable of being engaged by operating devices now to be described.

On the stud 450 and conveniently on a bearing turned on the hub of a stitch-length adjusting Ilever 281 forming a part of the existing machine, I provide a lever 7 00, having an indicator arm 701 and an upper arm 702. Indicatorarm 701 is in the. path of cams 522 attached to the surface of drum 120. Said arm 702 is provided with a lug 704 andcarries a rigid stud-703 on which rocker levers 710 and 711 are pivoted by means of bores in central parts formed as yokes 712 and 713, each yoke straddling a part of the other, to permit a wide and ed for clamp screws 0, to enable adjustment of b ts 11, lying respectively in the planes of ,60.

steady bearing on stud 703 for said rocker levers. Limit screws 715 held by lock-screws 716 in lug 704 engage with the lug 707 of lever 710 and with yoke, 713 of lever 711, 'to limit the motion of levers 710 and 711 under the stress of springs 720 held by an adj ustable arm 721 in a transverse bore in stud s by a screw 725. The levers 710, 711 e it nate at one end in oppositely facing grooved portions 730, 731, split at b,bored and threadsaid thrust bars, with respect to the grooved faces of said portions7 30, 7 31. The other arms 732 and 733 of said levers 710 and 711 ter- Inmate in bosses e and f each having a trans verse bore for a hardened follower pin g, said pins having rounded ends projecting from said bosses, and having their lower ends bev,

eled to cooperate with adjustment screws h transversely in said bosses. The screws carry elongated jam nuts Zc each of which surrounds a set screw at taking through the 7( boss into engagement witha pin g. Setting up screws 'm, will lock the screws h and pins 9 simultaneously.

The rounded points of the pins 9 serve as followers for determining movementof le--' vers 710 and 711 from actuating means comprising adjustable cams 736, 737 carried on the surface ofan integral drum 7.35 at the hub of gear ,31 in mesh with gear 30. Drum 735 rotates ,in unison with the needle-cylinder 260. (Jams 736 and 737 aregreferably alike, having a concentric sur ace w, a

i g 1 y, an a following slope in by-a thrust-bar 460. having :1- lug s'- in the path of a segmental cam 296'attached to the web-holder bed 295. VVhen' id bar 460 is in the lower position penmi ted by cam 500 on drum 120, adjustablv determined by an eccentric stop 448 contacting with comb 452, earn 296 reacts with lugs to move I bar 460 laterally against a cam lug F? on yarn guide F during a part of each revolution of the needle cylinder-thus to remove a splicing yarn carried by yarn guideF? from that part of the circle of needles corresponding to'cam 296, and feed the said yarn to the remaining needles only. As fully rot:

set out in said application, the section ofneedles so fed may be the short butt needles y at the back of the leg of the stockin including the needles n and n, and t e stitch length at said needles-may be increased by altering the position of some of the-web holders during feeding of the splicing yarn .by adjustment of a cam 312. Thesplicing yarn ordinarily is a relatively thin. yarn, not. suitable for either part ofithe foot and difi'erent therefore from the yarns car: r ed by the guides for the leg yarnfor theguides for feeding yarn at the "topan'd bottom of the foot respectively. a

The operation of my new device will now be apparent.

knitting of an article, which may be at any desired jtune for insta'nee prior to reaching the heeLcamJSOO runs' from under thrust;-

bar 460*, causingyarn-guide F to feed splicingyarn to needles M, n onlyjduringg At the ,proper time in ---the knitting of the ankle -The ,heeli.is kuit. as usual, and thereafter oneor' both of-the bars 460 are lowered by movement of drum 120 and cams 5001-a'nd'501, whereupon a 5 cam on'thedrum-IQO passes underethe 1,,

and the followers'gvto 'come into range of" cams 736,737. Theshaft 32, the drum 735 and the oams736, 737rotating at the same rate theneedle cylinder 260, an exchange of position of the thrust-bars and of their throat plate 559 of anygivenpartof the needle-circle Willfnow-be' determin'edby-the rotative position on drum 735 50f said cams 736, 737 and .the" adjustmentaf-levers 710, 711. The extent'of'elejvation "of the'guide F thrown out ofwork- :will depend on the position of thefolloweligthrough which it r braced rby overlapped j entering and leaving yarns will 'be determined bytheposition of slope a of onecam' witharespectfto slope y of the oth cam. 'Tlie {fldjilStllfiGIllY is such as to'cause llowergreachjng the inter' niediategleve gment 738' to position "its yarn guid t fan intermediate position causing the-warn. H to first encountei'fthe leading I needle fn just prior 'tothe similaradjustment ,of the other n of thelsalne group. Passage. ofsegment 738 pennitstheentering yarniguide to pass to itslowermostposition on throat plate 40 559, thus insuring feedingoffall the needles n or 02 following the sutureneedl'es'n'.

It will be'observed that the system made up of the lever "700, and its attachments is normally held by gravityin a position out p of contact 1 with the thrust" bars which it operates or. with the 'camdrum 735 and at tachments' by which it isfoperated and that there is nomotion of theparts-zcarried by the said lever 700 except-When the special structure is to bemmadeii When the lever 700 is in an idle position thethrust bars for therguides F- areavailable to be operated by the cams 501 on thefdrum 120 in the r usual manner' for changingthe yarn at pre- 55 determined parts of theffabrie- While I have described the operatlng connections 460, etc.,"in one'use between the pattern mechanism IQO-anddmitting instrumentalities such as theyarn-guides F, itwill be. understood that r such connections are often employed/to operate other knitting inst-rumentalities, 'andthat =my new devices for moving said connections from another actuating device than the said pattern mechanism form a part at my mvention independent 1y? and use e an ntent operateits yarn guide, in combination wit actuat ng means, and devices operates yarn guides F in'a time with the passage? by [for knitting, a plurality-of yarn guides,

is elevated, -ivlxilertln' number of needles em-' time with said ;rotary carrier and device ormore of said thrust bars at predetermine carriers, a plurality of yarn guides, and pat -tern controlled operating connections f gsaid yarn guides, fin conibinati' i jtu'atin means'glevicesnormal a ram with s'a'idc'onnections fo ropergatin ithe entering yarn guide:

yarn guide '18 by slope g 1; anseits yarn .3 to lea e'the'needles'atithe following'needle I l, contact with said connections at predete pattern controlled operating onnections if said actuating means to opera't h g a guides from said actuating ,m he at pred -terniined'times. i=.

' cancarriers, means to {rotate-one of said carrierslior lknitting i-a-plurahty of yarn iguides, an independent patfilrn controlled. operating connection for. can

the connections 460 may be applied .I do not herein claim'the invention co mon to this application andmy cop ending above mentioned or cprnmon to 7 What'I claim is: 3

I" 1. In a knittingmachin -needI an ca carriers a plurality of yarn guides,- an-flnd pendent thrust-bar for .each"oi said-Lguide pattern means for lifting each thrustbarto thereby independently to lift one orm'or said thrust-bars at predetermined time 2. In a'lrnitting machine, needles an carriers, means to rotate one .ofsaid ciu'rie independent thrust-bar for each i offisal guides, pattern means forfliftin' e h; thrust bar to operate its yarn bination with actuatingf nea jisj rotating in operated thereby independently to lift parts of each rotation of 'saidjrotary car r'ier."

f 3. In a knittingmachineineedle and cam connections from said actuating I y means for placing saiddevicesj perati mined times. 5 p g said yarn guidesy in combination-Within tun-ting means; devices normally "out ofco I tact with said connectionsa idssce sting means, and meansf g devices contact with sfidflfil ,Ohsi'and id yarn 5. In iaknit'ting machine, cam carriers, meansto rotate carriers forknitting, a plural ty guides, on independent pattern controlled operating connection tor each a1d, yard) guides, actuating means rotatmgx n l un son with said rotarycarrier and dev ces moviable into contact with eachof spluralityjof said connectionsto operate theirq yar'nf guides independently-from said 1 actuatingi means at predetermineditjmes; v i 6. In, a; kn" t machine, needles and of sai d yar T face and means to move said surface, yarn L tern surface determines operation and mopguides, actuating means rotating in unison with said rotary carrier, vand devices movable into contact witheach of a plurality of said connections to operate their yarn guides independently from said actuating means at predetermined parts of each rotation of sa d rotary carrier.

7. In aknitting machine, a pattern surguides, and connections whereby said pateration of said yarn guides, in; combination with act ating means, operating devices between said actuating meansand said connections and means'moving with said pat tern surface for rendering said operating device operative or inoperative upon said connections. I 1

8. In a knittingmachine having a knitting instrumentality adapted to be controlled at predetermined times and mechanism for controlling it, the combination of an operating connection between said instrumentality and said mechanism, ac uating means, an operating device for moving said operating connection from said. actuating means, and means tor bodily mov-' ing said operating device into and out of operative contact with said actuating means and with sa'idoperating connection.

t). In a knitting machine having knitting instrumentalities-adapted to be operated at predetermined times, tllltl" 1)ilttll1 mechanism for operating them, a plurality ofoperating connections between said instrumentalities and said mechanism, actuating means and operating devices for moving 4 each of said operating connections independently from said actuating means, comprising independent levers, in combinationwith means 'for bodily moving said levers into and out of operative contact with said actuating means and with said operating connections at predetermined times.

1O. In a knitting machine, knitting instruated by said pattern devices for 'ating connection two subscribing witnesses.

'mentalities' and a plurality of operating connectionsthereto, pattern devices for directly moving said connections,. actuating means, and a series of actuating levers for said connections, in combination with leans oper- $0 liodily moving said levers into and out of'izontact with said hiztuating means-and with said opers' i t predetermined times 11. In a kniadig tion with needles ofmeans for feeding yarn for tubular knitting, means for feeding an additional var-g1 for spltcing to a section of said needlesohly, and means for feeding yarns respectively to veach of overlapping sections of said needles for split tubular knittinm' I,

12. In a knitting iii l'finein combination, needles, independently movable yarn guides, means for operating oneof said yarn guides for splicing at one section only of'said nee- (lles, and means'ifor operating other of said yarn guides to knit respectively at said secdetermining the times of operation of said means. g

' In testimony whereot, I have signed my name to this specification 1n the presence of ROBERT W. SCOTT. Witnesses: i RUTH A. Rornn,

MARY F. GRIFFIN.

nachine, the coinbinai- 55 v 

